Patents
Patents for G01L 13 - Devices or apparatus for measuring differences of two or more fluid pressure values (2,634)
01/1992
01/28/1992CA1294794C Method and apparatus for automatic offset compensation in parameter-sensing transducer systems
01/14/1992US5081448 Differential pressure indicator with temperature compensation
01/14/1992US5079953 Pressure gage
12/1991
12/24/1991US5074148 Resonance frequency liquid level sensor
12/18/1991CN1015133B Differential pressure sensor
12/18/1991CN1015132B Differential pressure transducer
12/11/1991EP0460498A2 Automatic transducer selection system for pressure measurement
12/10/1991US5070736 Differential pressure sensor with read-out device
12/10/1991CA1293006C Adjustable range spring for differential pressure responsive devices
12/05/1991CA2043688A1 Automatic transducer selection system for pressure measurement
12/04/1991CN1056747A Transducer for measuring pressure
11/1991
11/13/1991CN1014744B Split-seconds type silicon varistor pulsating flow rhysimeter probe
11/12/1991US5063783 Pressure monitoring and method
11/06/1991EP0454972A2 A high gain differential-to single ended amplifier having a tee network feedback loop
11/06/1991CN2088248U Double diaphragm optical fiber differential pressure pickup
10/1991
10/29/1991US5061832 Field settable differential pressure switch assembly for low fluid pressure applications
10/17/1991WO1991015743A1 Differential pressure sensor and method of manufacturing the same
10/15/1991US5056369 Capacitive differential pressure detector
09/1991
09/03/1991CA1288294C Pressure differential indicator with non-mechanical thermal lockout
08/1991
08/28/1991CN1013712B Differential-pressure sensor
08/27/1991US5042308 Electrostatic capacitance type pressure detector
07/1991
07/30/1991US5035145 Differential manometer pressure gage
07/24/1991EP0438373A2 Differential pressure gauge
07/17/1991CN1013224B Isolator apparatus
07/03/1991EP0434818A1 Apparatus and method for measuring reservoir pressure changes
06/1991
06/25/1991US5027081 High gain differential-to-single ended amplifier having a tee network feedback loop
06/19/1991EP0432669A2 Method and device for monitoring the air pressure in railway carriages
06/18/1991US5024100 Automatic transducer selection system for pressure measurement
06/12/1991EP0431345A2 Probe for measuring pressure of a fluid flowing in a pipe
05/1991
05/07/1991US5012677 Differential pressure transmitter
04/1991
04/18/1991WO1991005232A1 Capacitive pressure transducer system
04/10/1991EP0421394A2 Differential pressure measuring device
04/03/1991EP0420105A2 Differential pressure measuring device with autocontrol
04/03/1991CN1050440A 差压传感器 Differential Pressure Sensor
03/1991
03/27/1991CN1012217B Semiconductive force transferring apparatus
03/20/1991EP0417317A1 Differential pressure gauge
03/19/1991US5000048 Circuit arrangement for temperature compensation of capacitive pressure and differential pressure sensors
02/1991
02/27/1991CN2072223U U-tube differential manomete with precision scale
02/26/1991US4995266 Differential pressure transmitter
02/20/1991EP0413086A1 Electro-acoustic transducer
02/19/1991CA1280291C Differential pressure transducer
02/06/1991EP0411230A1 Pressure measuring device
02/05/1991CA1279772C Dual diaphragm differential pressure transducer
01/1991
01/30/1991CN2070441U Differential pressure device for monitoring cavity sealing function
01/29/1991US4987782 Capacitive pressure transducer system
01/22/1991US4986127 Multi-functional sensor
01/10/1991WO1991000415A1 Apparatus and method for measuring reservoir pressure changes
01/02/1991EP0405633A2 Pressure/Differential measuring device
01/02/1991CN1011073B Flangeless transmitter coupling to flange adapter union
11/1990
11/28/1990CN1047420A Manufacture method and structure of monocrystalline-silicon pressure transducer
11/27/1990US4972716 Semiconductor pressure converting device
10/1990
10/31/1990EP0395200A1 Method and system for determining vapor pressure of liquid compositions
10/30/1990CA1275579C Pressure indicating device
10/17/1990EP0392272A1 Measuring and/or controlling device for fluid flow and/or quantities of heat
10/17/1990EP0392271A1 Measuring device for fluid flow and/or quantities of heat
10/10/1990CN2063638U Differential pressure transducer
10/04/1990WO1990011503A1 Differential pressure gauge
10/03/1990CN2063232U Measurer for ultramicro-pressure
09/1990
09/26/1990EP0316343A4 Media isolated differential pressure sensors
09/26/1990EP0312532A4 Differential pressure sensor
09/19/1990EP0323963A4 Flangeless transmitter coupling to a flange adapter union
09/18/1990US4957001 Apparatus and method for measuring reservoir pressure changes
09/18/1990CA1274102A1 Self-zeroing pressure transmitter with automatic pressure manifold
08/1990
08/29/1990CN2061281U Ultramicro differental pressure transmitter
07/1990
07/11/1990EP0164413B1 Pressure transducer
07/04/1990EP0376631A1 Differential capacitive pressure sensor with over-pressure protection and method of providing over-pressure protection to a capacitive pressure sensor
06/1990
06/05/1990CA1269861A1 Pressure transmitter housing
05/1990
05/30/1990EP0177491B1 Pressure compensated differential pressure sensor and method
05/03/1990WO1990004701A1 Solid state differential pressure sensor with overpressure stop and free edge construction
04/1990
04/20/1990CA2001047A1 Solid state differential pressure sensor with overpressure stop and free edge construction
04/04/1990EP0361590A2 Temperature-compensating circuitry for capacitive pressure or pressure difference transducers
03/1990
03/21/1990CN1040682A Differntial pressure transducer
03/21/1990CN1040681A Semiconductive force transferring apparatus
03/20/1990US4909083 Pressure/differential pressure measuring device
03/06/1990US4905575 Solid state differential pressure sensor with overpressure stop and free edge construction
03/06/1990US4905505 Method and system for determining vapor pressure of liquid compositions
01/1990
01/23/1990US4895026 Semiconductor pressure sensor
01/02/1990US4890497 In a control loop for process control
12/1989
12/13/1989CN1037964A Resistance strain-type differential pressure sensor
11/1989
11/07/1989US4879627 Differential capacitive pressure sensor with over-pressure protection
11/07/1989US4878385 Differential pressure sensing apparatus
11/02/1989EP0339981A2 Laminated semiconductor sensor with overpressure protection
10/1989
10/04/1989CN1036076A 差压传感器 Differential Pressure Sensor
09/1989
09/27/1989EP0334611A2 Pressure transmitter assembly
09/13/1989EP0331772A1 Differential pressure meter for bidirectional flows of gas
08/1989
08/09/1989EP0327524A2 Differential pressure sensing apparatus
07/1989
07/19/1989EP0323963A1 Flangeless transmitter coupling to a flange adapter union.
07/19/1989CN1034060A Dual sided pressure sensor
07/13/1989WO1989006350A1 Differential pressure meter
07/06/1989DE3821690A1 Device for the measurement of small pressure differences
06/1989
06/27/1989US4841777 Pressure transmitter assembly
06/27/1989US4841776 Differential pressure transmitter
06/21/1989EP0321097A2 Pressure sensors
05/1989
05/30/1989US4833920 Differential pressure sensor
05/24/1989EP0317532A1 Pressure indicator
05/24/1989EP0316343A1 Media isolated pressure sensors.
05/16/1989US4829826 Differential-pressure transducer
05/09/1989US4827772 Differential pressure sensing means and method
04/1989
04/26/1989EP0312532A1 Differential pressure sensor.
04/25/1989US4823604 Pressure transducer assembly
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